Ayatullah Sayyed Musa Shubairi Al-Zanjani, detailed his verdict on this issue by saying: If dealing with this type of currency has economic corruption or is contrary to the law, then dealing with it, selling and buying it is problematic. And exchanges with it, and it is not permissible to refer it to another mujtahid. While a number of our scholars went for the permissibility of dealing with it and considering the transaction valid, including Ayatullah Muhammad Saeed Al-Hakim, who said: The crypto currency transaction is permissible, but it may expose the believers’ money to danger, so caution is necessary.. Ayatullah Sayyed Muhammad Sadiq Al-Rouhani said: It is permissible to deal with it through the direct purchase of things through it, or in exchange for its exchanged value against other currencies, whether electronic or paper, and there is no problem with that from this point of view.Among them is Ayatullah Sheikh Muhammad. Ishaq Al-Fayyad who said: It is permissible if it has value and the transactions in it are not approved as a waste of money dealing with usurious transactions. 

There are many other leading scholars in the Hawza of Najaf Ashraf and Qum who also say that dealing with cryptocurrencies is permissible.

Wassalam.